<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>弹跳彩球</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <h1>弹跳彩球</h1>
  <p>还剩多少个球</p>
  <canvas></canvas>

  <script src="main.js"></script>
</body>

</html>